摘要
依据国际标准ISO2631和国家标准GB/T4970《汽车平顺性随机输入行驶试验方法》对某型轿车进行平顺性试验,采集了汽车座椅底板处三轴振动加速度值。以Matlab为软件开发平台,实现了评价标准中时域法和频域法计算加权加速度均方根值,并重点研究了小波变换方法在汽车平顺性评价中的应用,实现了小波变换方法计算加权加速度均方根值。对三种计算方法进行比较,结果表明:各种算法计算结果差距不大,时域法更简洁;频域法适用于1/3倍频程分析人体振动影响;小波变换方法结果更接近于时域法,并且其具有时频局部分析特点,可以较好地应用于汽车平顺性研究中。
Based on the international standard ISO2631 and national standard GB/T4970 ＂Method of running test-automotive ride com- fort＂, the ride comfort tests are conducted on a car and the triaxial vibration acceleration values of the car seat are collected. Time do- main, frequency domain and wavelet transform aigorithm which can calculate the weighted root-mean-square acceleration are implemen- ted with the Matlab software development platforms. Wavelet transform algorithm is key research. The results show that the outcomes of calculation with different algorithms don＇ t have significant differences,time domain method is more sample;frequency domain method is suitable for 1/3 octave analysis of the impact of human vibration;wavelet transtbrm method results closers to the time domain, and be- cause of the frequency characteristics of local analysis, it can be better used in the vehicle ride comfort.
出处
《计算机技术与发展》
2014年第4期158-161,共4页
Computer Technology and Development
基金
国家自然科学基金资助项目(61134004/F0301)
关键词
汽车
平顺性
小波变换
时域法
频域法
vehicle
ride comfort
wavelet transform
time domain method
frequency domain method
